Coal mine goaf filling mining and gob-side entry filling technology

Abstract

A filling system applicable to coal mining is characterized in that a gob filling material crushing and mixing station chamber is arranged on a ginney top, a stowboard is arranged within a certain distance of a rock coverage stratum on a coal mining face, fan drilling construction is performed from the stowboard above a gob to the gob, filling pipelines are laid in the stowboard, a measure for blocking between the coal mining face and the gob includes that the coal mining face and the gob are separated by a shielding plate at the rear of a hydraulic support, the gob-side entry retaining filling process includes that a gob-side entry retaining and the filling gob are separated by an individual hydraulic prop and a steel mould plate. Filling materials are conveyed to the gob through the filling pipeline; after the filling materials are solidified in certain strength, the coal mining face is pushed ahead, and mining and filling are performed circularly. The coal mine gob filling mining system and the gob-side entry retaining filling process have the advantages that stope ground pressure is effectively controlled to reduce subsidence; occupation of fertile farmland by coal gangue is avoided to eliminate environment pollution caused by the coal gangue, and green mining of coal mines can be realized.

Description

technical field [0001] The invention relates to a filling method suitable for coal mining, in particular to the mining field of gently inclined and inclined coal seams which are severely affected by mining. Background technique [0002] Coal is a primary energy source and occupies a dominant position in my country's energy structure. With the rapid development of my country's economy, along with the increase in demand for energy, the amount of coal mining has also increased significantly. In 2013, my country's coal production has exceeded 4 billion tons. At the same time, the environmental problems caused by coal mining are becoming more and more serious. For example, coal mining causes rock movement and destruction, forming "three zones" in the overlying rock strata, causing the flow of water and gas in the rock strata, leading to coal mine gas accidents and underground water inrush. Accidents; ground surface subsidence and damage to building facilities; a large amount of g...

AI Technical Summary

Problems solved by technology

At the same time, the environmental problems caused by coal mining are becoming more and more serious. For example, coal mining causes rock movement and destruction, forming "three zones" in the overlying rock strata, causing the flow of water and gas in the rock strata, leading to coal mine gas accidents and underground water inrush. Accidents; ground surface subsidence and damage to building facilities; a large amount of gangue accumulated on the ground not only occupies good land, but also causes environmental pollution; with the continuous increase of mine mining depth in my country, dynamic disasters such as mine pressure appearing and rock burst The frequency increases and the intensity increases, endangering the safe production of the mine

The Chinese patent application number 201110388670.1 discloses a strip-type fluid expansion filling mining method for coal seams below medium thickness, which adopts strip mining and is limited by the inclination angle of the coal seam; The roadway filling mining method adopts roadway mining and filling with a bolt-digging integrated machine or a continuous coal miner, and the mining efficiency is low. This method is only suitable for small mines or local "three-down" mining; Chinese patent publication with application number 201110028042.2 A coal mine filling and mining working face support system; the Chinese patent application number 2011100396497.X discloses a mobile mechanical seal filling and mining support

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